Mobile Printing Robot for Inline Construction Layout Markings
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Solution Overview
Problem
The conventional method of using colored chalk and strings for marking construction trade information on building sites is limited in representing useful information and often leads to confusion due to the restricted number of distinguishable colors and the difficulty in accurately placing lines, especially when obstacles are present.
Innovation Solution
A mobile printing robot system that includes a controller, drive system, and printing system to print construction trade information directly on the building surface, incorporating line type attributes such as directional and offset information inline with the layout lines in a single pass, using variations in color, dashes, and alphanumeric text.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional colored chalk and strings are used for marking construction trade information, then the marking process is simple and quick, but the number of distinguishable colors is limited and confusion arises among different trade lines
Solution Approach 1:
The patent transitions from 2D chalk/string markings on the floor to 3D physical markers (prisms, cylinders, or other shaped objects) that can be placed vertically on the construction surface. These 3D markers incorporate multiple visual dimensions including color, shape, size, and orientation to encode different trade information, thereby significantly increasing distinguishability beyond the limited color palette of traditional chalk methods.
Solution Approach 2:
The system utilizes color as a primary differentiating feature among the physical markers. Each construction trade is assigned specific color(s) for its markers, and the color information is encoded in the digital model to guide placement. This extends the conventional chalk color approach to a more robust physical marker system with enhanced color differentiation and combination capabilities.
2Manufacturing precision
If multiple passes are used to print layout lines and trade information separately, then printing precision can be maintained, but construction time and productivity are reduced
Solution Approach 1:
The patent combines the printing of layout lines and trade information into a single integrated printing operation. The system prints both the positional line information and the associated trade metadata (such as trade type, material specifications, or installation notes) simultaneously in one pass, eliminating the need for separate printing passes and thereby maintaining precision while significantly improving construction productivity.
Solution Approach 2:
The printing system is designed to perform multiple functions in a single operation: it prints the layout lines for positioning, adds trade-specific information labels, and provides visual cues for different trades all at once. This multi-functional capability allows the system to replace what would traditionally require multiple specialized printing or marking operations, thereby enhancing both precision and efficiency.
3Productivity
If chalk strings are snapped to create lines, then the process is fast and requires minimal equipment, but accurate placement becomes difficult when obstacles are present
Solution Approach 1:
The patent replaces the mechanical chalk-string snapping process with a digital printing system that uses computational geometry and coordinate-based positioning. Instead of physically snapping strings that must be manually aligned and adjusted, the system calculates precise line positions based on digital models and prints them accurately using controlled printing mechanisms, thereby eliminating the placement difficulties associated with obstacles while maintaining high marking speed.
Data Source
AI summary
A mobile printing robot prints a building layout on a construction surface. The building layout has lines that are printed. The mobile printing robot also prints additional line attribute information to aid construction crews. This may include a description of line type (e.g. control line, wall type, etc.). It may also include information on offset as another example. As still another example, directional information may be printed for a line. As still another example, mandatory or voluntary construction details, such materials to be used for implementing features associated with the layout lines, may be printed.